Numerous variations and modifications of these forms exist.
With these variations is involved the problem of the early history of the Israelites.
South Australia proper extends over 26 degrees of latitude, and naturally presents considerable variations of climate.
It is subject, however, to extreme and rapid variations in temperature, to alternations of dry and humid winds (the latter, called catias, being irritating and oppressive), to chilling night mists brought up from the coast by the westerly winds, and to other influences productive of malaria, catarrh, fevers, bilious disorders and rheumatism.
In reality, however, it experiences fewer climatic variations than the other great continents, owing to its distance (28°) from the Antarctic circle and (11°) from the equator.